equal sign, that is, the left side of the equal sign is equivalent to the right side of the equal sign. In other words, we only changed the original expression A without losing any information. It's like 24 = 2*3*4. Therefore, if LSI directly uses SVD, not only R is uncontrollable, but R is likely to be too large to achieve dimensionality reduction, in fact, this operation not only does not reduce the dimension, but also consumes a lot of computing t
In the early SAN storage system, the data transfer between the server and the switch was done through optical fiber, because the server was transferring the SCSI instruction to the storage device, could not take the IP protocol of the ordinary LAN network, so it needed to use FC transport, so this SAN is called Fc-san, And later appeared with the IP protocol encapsulated SAN, can completely walk the ordinary LAN network, so called Ip-san, which is the most typical of the now popular iSCSI.
Both
1, first introduce what is the HBA.
Here the HBA, the full name FC HBA, that is, fibre Channel Host bus Adapter. In a FC network, a host (such as a server) needs to connect to a FC network, FC storage device (such as a SAN), using an interface card, just as Ethernet cards are required to connect to Ethernet. This interface card is called FC
In Solaris, how to configure the fc hba to an Ethernet Card IPFC can easily set a fc hba to an Ethernet card, which is of great significance. In some work sites, if you need to copy a large amount of data through the network, you will often find that the speed of the Gigabit Nic is insufficient, and network aggregation cannot compensate for bandwidth insufficiency, at this time, you can make full use of the
1. Install all SAS hard drive, boot up
2, the post process appears Ctrl + C prompts, press CTRL + C into LSI Logic Config Utility ...
Start SAS configuration
3, select the "SAS 1068" channel, press.
4, RAID select "Raid Properties", press
RAID Properties: Creating, managing arraysSAS topology: View Physical disk and RAID configuration informationAdvanced Adapter Properties: View advanced attributes and their restore Defaults (this action do
Host Bus Adapter-Host Bus Adapter (HBA) is a Host Bus Adapter that provides input/output (I/O) between servers and storage devices) A circuit board and/or integrated circuit adapter that processes and physically connects. Because the HBA reduces the burden on the master processor in data storage and retrieval tasks, it can improve server performance. An hba and t
VMware, on the official blog today, said the use of PVSCSI storage adapter driver can improve 10-30% performance for high IO VMs. See
Http://blogs.vmware.com/performance/2010/02/highperformance-pvsci-storage-adapter-can-reduce-cpio-by-1030.html
We know that the default type of SCSI controller when creating VMS is the LSI Logic. Now under vsphere 4, you can select a new type PVSCSI (the option is VMware paravirtual), and this type can significantly
The company has several servers installed on esxi5.0 virtual machines. They used to use common desktops, now we have purchased a dedicated server and installed the LSI 8708 sas raid card (the server's onboard RAID card esxi is not supported). Now we need to migrate the virtual machine.
The best method would have been to mount the array. Now the virtual machine is moved to the array and then to the new server. However, the company's array is full and t
The solutions are:1. Use MS Utility "Fcinfo.exe" (Fibre Channel information Tool (fcinfo)) to view the WWN number of the HBA card.The Fcinfo tool is installed on a Windows system that needs to view the WWN number, and then, in the Start menu, type "CMD" in "Run" and enter command-line mode, and you can see the WWN number of the host HBA by entering Fcinfo.2, after searching, find article finds
Tags: Linux replace HBA card after re-scan instructionsHere's how to view the HBA card WWN number:[Email protected] ~]# Cat/sys/class/fc_host/host*/port_name0x10000090fa4849fe0x10000090fa4849ffYou can also see the WWN number under Linux.Once the WWN number is changed, the system cannot directly update the mounted back-end storage disk. To re-scan the disk, you can use the following methods to perform the sw
When a new technology or product emerges, everyone is eager to know whether or when the new product will completely replace the original product. In fact, many products have a "long tail effect". For example, when a disk backup occurs, people think that the tape will soon exit the market, but today the tape is still the main force of backup and archiving; after the emergence of SSD, many people think that it will eventually replace the mechanical hard disk, but at least from now on, it is not ea
About the LSI 2208 array card is not enabled by default JOBD mode, how to configure as JBOD mode1, the server boot press ctrl+y into the BIOS preboot CLI interface2. Enter the command:$ Adpgetprop Enablejbod-aall (can be viewed to JBOD is disabled)Adapter 0:jbod:disabledExit Code = 0x0Enable JBOD$ adpsetprop enablejbod 1-aall (enable array card JBOD mode)Adapter 0:set JBOD to Enable success.Exit Code = 0x03, restart the server and press Ctrl+h to ente
With the development of LSI, the computer entered the fourth generation development. The fourth generation computer takes the large scale integrated circuit as the logic element and the memory, causes the computer to the miniaturization and the massive two direction development. From the first generation to the fourth generation, the architecture of the computer is the same, which is composed of controller, memory, arithmetic and input, called von Neu
Root tree enumeration and Its Application in LSI analysis and identification and Program Arrangement simplification
(Enumeration problemsCompleted by a student as a graduation thesis. I wrote the Application Section)
Root tree Enumeration
Requirement: write a program that includes {n} and {Non-standard root tree} A 1-1 correspondence is established between all elements.
The following table lists natural numbers.N = 1... 18Correspond
)"
Uevent =
Device = "host14"Device path = "/sys/devices/pci0000: 80/0000: 80: 0b. 0/0000: 81: 00.0/host14"Ct =Els =Fw_dump =Nvram = "ISP"Optrom_ctl =
Optrom =
Reset =
Sfp = ""
Uevent =
Vpd = "? 0"
We can see that the OS recognizes two hbas as host13 and host14 (HMM ~~ The style is different from that of solaris ). Generally, a cardNode_name and port_name are the wwn of the HBA, and their values are the same. Sp
the server with Ubuntu system is turned on, but to see the status of the server RAID10, the LSI megacli Disk array management tool can be viewed by the following steps:1. Add Update sourcesudo vim/etc/apt/sources.list//add at the end
Deb Http://hwraid.le-vert.net/ubuntu Precise Main
sudo apt-get update//updating sourceNote: Some warnings can be ignored, but if you are prompted with a GPG error, you need to add a certificate
1. If you have multiple raid on a LSI array card, you may report hard disk error (CentOS 6.6) If you need to install the system on the first raid, or you can create a raid on the system first.
2. Hot Plug the consequences: If the hard drive does not fail, RAID is normal, in the system running state to hot plug hard drive, will cause raid different steps, the entire RAID may appear various strange problems,
For example: 1. HDD display off-line, red a
Latent Semantic Indexing is an algorithm that relies heavily on SVD. This article is reproduced from the summary of Wu Jun's beautiful mathematics and the reference document mathematics in machine learning.
------------
In natural language
, lsi70000xp, (4 GB)PCI-X: lsi7202xp, lsi7402xp (2 GB)Lsi7104ep, lsi7204ep
2>. co-existence with Qlogic and LSI failover drivers========================================================== ======================================The RDAC driver cannot co-exist with an HbA-level failoverDriver such as the Emulex, Qlogic or LSI logic
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